I can answer that for TekSavvy, but I would be very interested to hear about it, as well, from carriers.
For us it largely depends on the platform and on what equipment we have in place. We can see whatever information the carriers give us. We're wholesale providers and so we largely rely on the carriers for information about the actual connection that our end-users have. Where that information is available to us, we would know the volume, how many gigabytes a person has downloaded in a certain period of time.
We could put equipment in place that would look into that content and find out what it is. We do not do that, so we have no visibility into the content of any end-user traffic. It goes further than that. It's not just content; it's what protocol is on the Internet. We just don't watch that or keep track of it, but there is equipment available, and we would be able to use that if we were interested in tracking that kind of information about our users.